Title: Annual Technical Progress Report

Abstract

This report describes the results generated during phase 1 of this project. During this phase, the main tools that are used to compute the thermal neutron scattering kernels for graphite, beryllium, beryllium oxide, zirconium hydride, light water, polyethylene were implemented and tested. This includes a modified NJOY/LEAPR code system, the GASKET code, and the ab initio condensed matter codes VASP and PHONON. Thermal neutron scattering kernels were generated for graphite, beryllium, beryllium oxide. In the case of graphite, new phonon spectra were examined. The first is a spectrum based on experiments performed at Oak Ridge National Laboratory in the early seventies, and the second is generated using the ab initio methods. In the case of beryllium, and beryllium oxide, a synthetic approach for generating the phonon spectra was implemented. In addition, significant progress was made on an experiment to benchmark the graphite scattering kernels was made. The simulations of this experiment show that differences on the order of a few percent, in Pu-239 detector responses, can be expected due to the use of different scattering kernels. (B204) NOT A FINAL REPORT

@article{osti_801764,
title = {Annual Technical Progress Report},
author = {Ayman I. Hawari},
abstractNote = {This report describes the results generated during phase 1 of this project. During this phase, the main tools that are used to compute the thermal neutron scattering kernels for graphite, beryllium, beryllium oxide, zirconium hydride, light water, polyethylene were implemented and tested. This includes a modified NJOY/LEAPR code system, the GASKET code, and the ab initio condensed matter codes VASP and PHONON. Thermal neutron scattering kernels were generated for graphite, beryllium, beryllium oxide. In the case of graphite, new phonon spectra were examined. The first is a spectrum based on experiments performed at Oak Ridge National Laboratory in the early seventies, and the second is generated using the ab initio methods. In the case of beryllium, and beryllium oxide, a synthetic approach for generating the phonon spectra was implemented. In addition, significant progress was made on an experiment to benchmark the graphite scattering kernels was made. The simulations of this experiment show that differences on the order of a few percent, in Pu-239 detector responses, can be expected due to the use of different scattering kernels. (B204) NOT A FINAL REPORT},
doi = {10.2172/801764},
journal = {},
number = ,
volume = ,
place = {United States},
year = 2002,
month =
}

The Annual Progress Report, Fiscal Year 1992, summarizes the research performed by the US Army Biomedical Research and Development Laboratory in projects authorized by the US Army Surgeon General and the Commander, US Army Medical Research and Development Command. This research was supported by RDTE funds from the US Army Medical Research and Development Command, and as reimbursables from the US Army Corps of Engineers, and from several additional sources.... Aquatic toxicology, Biochemical toxicology, Carcinogenicity research, Reproductive effects research, Toxin decontamination, Biological warfare.

The announcement by President Bush of a national no net loss wetlands policy is the result of growing public concern about the rapid loss of these important resources. Wetlands provide essential breeding, spawning, nesting and wintering habitats for a major portion of the region's fish and wildlife. In addition, wetlands function to purify surface water, moderate flood flows, maintain year round stream and river flows, reduce erosion and support commercial fishery and recreation industries. In recognition of the importance of wetlands to the environmental quality and economic productivity of the Bay, the Chesapeake Executive Council adopted the Chesapeake Bay Wetlandsmore » Policy in December 1988. The Policy includes a commitment to adopt an implementation plan. The annual report discusses the Living Resources Subcommittee's Wetlands Workgroup progress on these projects over the last year, and the near term goals for the next year. The progress to date includes work completed for the first phase and beginning to set up the second phase of the implementation plan.« less